Masterbatch concentrate

Diluted from 20 masterbatch concentrate. H g, increase in hardness by 10 points. M g, 50 increase in modulus. 

From 2% masterbatch concentrate, + Nickel dlbutyl dithlocarbamate... 

Are impact modifiers too difficult to process Impact modifiers are being supplied in easier-to-process forms. Development work with masterbatch concentrates, which are more user-friendly for the nonspedalist compounder/molder, have shown that well-dispersed talc and rubber in a masterbatch can be used to create TPOs with equivalent properties as with TPOs from traditional direct compounding. Other, "at-the-press" methods for creating TPOs or for modifying PE film are becoming possible (see Case 8.4) [7-12],... 

Solution A masterbatch concentrate containing a fast nucleating agent. 

The report does not cover polymerisation additives, compounding machinery or masterbatches ( concentrates ). Nor does it cover some of the more specialised additives used in active packaging, such as oxygen scavengers, or those that are specific to the thermosetting resin, rubber and coatings industries. 

An important market for additives is in masterbatch - concentrated formulations that offer the processor a convenient means of handling additives, particularly pigments, by diluting with natural material beside or actually in the processing machine. They also offer advantages in inventory size and raw materials storage space. 

A trend of recent years has been to supply additives processed into safe forms, in pellets, capsules, liquids and masterbatch concentrates and so, for the compounder and processor, the hazards have largely been taken out, but it is still important that they should be aware of them. For most compounders and processors of thermoplastics, the hazard from additives can now be safely contained upstream, during manufacture of the additives. In moulding and fabricating wet polymer systems, such as polyesters and polyurethanes, however, it is essential to take precautions. 

Additives are incorporated into polymer matrixes by a variety of methods and at various points in the manufacturing process. Polymer producers typically incorporate additives as single components or as blends of two or more additives during the pelletization/isolation step. Converters and transformers often introduce additives as a concentrate or masterbatch. Concentrate is a mixture is a mixture of an additive dissolved in a polymer resin carrier at fairly high (10-30%) concentrations. A masterbatch is a blend of additives and often pigments in a resin carrier designed for a specific end-use application. 

Masterbatch concentrates of antioxidant thiols as additives for rubbers... 

The masterbatch concentrate procedure has proved to be very important practically because it is a highly economical way of introducing bound antioxidants into polymers. Surprisingly, concentrated masterbatches of bound antioxidants are no less effective when reduced in concentration to normal antioxidant concentrations J- an are bound antioxidants made by modifying the whole of the rubber. This is illustrated in Table 4 for nitrile-butadiene rubber using typical antioxidant thiols. It can be seen that even after exhaustive extraction the bound antioxidants are more... 

In the past, the routes in Figure 1.2(a) were very widely used, with many compounds available containing the right additives to meet particular needs and specifications. Over the years there has been a trend for additives to be incorporated at the product extrusion stage as masterbatches/concentrates in which the additives have been well mixed at a high concentration into a suitable polymeric carrier. These masterbatches, which are produced in similar equipment to that used for compounds, are added to natural polymer at a dilution which gives the required additive concentration in the... 

Studholme, M. Acid Dye Stain-Resistant Fiber-Forming Polyamide Composition Containing Masterbatch Concentrate, Containing Reagent and Carrier (Prisma Fibers). U.S. Patent 6,117,550, 2000. 

In ccnqparison with other antiblocking agents, Sipemat 44 is relatively readily dispersible. Mevertheless, it is advisable to Incorporate Sipemat 44, too, according to one of the usual methods (in most cases knsader) to a masterbatch (concentrate). 

Various types of masterbatches are used with PP - such as PE based, PP based and the universal type. Addition levels of, and greater than, 3% of the PE-based type can lead to poor weld line strengths and delamination occurring due to poor dispersion, or inhomogeneity, of the PE in the PP molding typical concentration levels of 1 to 2% are recommended. Universal masterbatch concentration levels of 1 to 2% are also... 

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